Pneumatic dispatch tube carrier



Dec. 3, 1935.

H. BUSCH PNEUMATIC DISPATCH TUBE CARRIER V Filed Dec. 28, 1934 INVENTOR.

BY 29 ATTORNEYfiI Patented Dec. 3, 1935 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to pneumatic dispatch v tube carriers and particularly to the type of carriers in which one end is adapted to be opened or closed for the removal or enclosure of papers. 5 Such a carrier is shown and described in a patent issued to J. T. Needham, March 28, 1916, No. 1,176,918.

It has been found in practice, that it is frequently necessary to remove the working parts of 10 the enclosure mechanism of this type of carrier for the purpose of removing rust and paper dust, which accumulate during usage and prevents the spring from functioning properly.

The object of the present invention is to im- 15 prove the construction of carriers, having this type of closure, so as to make the working parts more accessible for cleaning and repairing and also to provide a means of lubrication for the said parts which will prevent the lubricant from soil- 2 ing the papers or other contents of the carrier.

In the accompanying drawing:- I

Fig. l is a plan view showing the carrier open for insertion or removal of contents.

Fig. 2 is a side elevation of the same.

25 Fig. 3 is a plan view showing the carrier closed.

Fig. 4 is a longitudinal sectional view taken on the line 44 of Fig. 3, and

Fig. 5 is an enlarged longitudinal sectional view of the closure mechanism taken on the line 55 30 of Fig. 4.

Referring to the parts by reference numerals, l designates a cylindrical member preferably made of metal and closed at one end by a cup shaped member 2 which is riveted or otherwise attached 35 thereto. A cylindrical block 3, of felt or other suitable material, is secured to the cup shaped member so as to provide a buffer or piston head for the carrier and a band 6 is secured around the open end of the member I to reen'force the 49 latter at that point. The numeral 1 indicates a tubular member closed at one end by a plug 8 and provided at the other end with a removable screwplug 9. Through this plug is slidably movable a rod l8 which is provided at one end with a re- 45 movable head I l shown as threaded onto the rod, a compression spring l2 surrounds the rod in and one end of this spring bears against the said head,

the other end of the spring bears against a collar l3 which loosely encircles the rod and is cupped on one side so as to .act as a stuffing box gland, the screw-plug 9 is similarly cupped and serves as the other gland so that when packing is placed 5 between the two parts at I4 the pressure of the spring urges the rod l0 inwardly and also, by its pressure against the collar l3, causes the packing to prevent leakage around the rod Ill. The movable parts of the closure mechanism are thus pro- 10 tected from dust and dampness and oil may be placed in the tubular member to keep said parts lubricated and free from rust.

The outer end of the rod I0 is shown as being coiled to form a handle I g and a flat spiral I0, adapted when in proper position, to hold papers within the carrier. The tubular member 1 is attached to the inside of the member I, preferably by rivets through the holes l5, and in such position that when the rod l 0 is drawn inward by the spring the handle ID will be entirely within the open end of the carrier.

When it is desired to place papers in the carrier or to remove them therefrom, the rod 10 is pulled outwardly, against the tension of the spring 12, by means v of the handle H3 and turned so that the flat spiral I0" is in the position shown in Figs. 1 and 2 of the drawing thereby permitting free access to the interior of the carrier.

I claim as my invention:

A pneumatic tube carrier including a cylindrical body member having a closed and an open end,

a tubular member within said body member and attached longitudinally to the inner wall thereof, said tubular member being closed at one end and having a removable screw-plug at the other, a rod adapted to slide through a hole in the screw plug, said rod being formed at one end so as to be capable of confining contents within the body member of the carrier and having a removable head at the other end adapted to slide within the tubular member, a collar encircling the rod, a compression spring interposed between said collar and the head on the rod and packing interposed between the collar and screw-plug.

HERMAN BUSCH. 

